Watching this featurette and hearing from the cast members, we've got a new respect for just how unpredictable, crazy, and disturbing Jared Leto was on set. It's genuinely uncomfortable to watch Leto making out with Margot Robbie, and to hear Robbie herself say that she had no idea what was going to happen on set. The relationship between Harley and Joker is, by its very nature, extremely messed up: the Joker is a manipulative, abusive partner and Harley has a twisted, self-destructive dependency on him. To ask Jared Leto (who is doing his best to be the Joker) to bring that messed-up relationship to life—including strapping Robbie to a table, kissing her, and pretending to hurt her—must have been pretty frightening for everyone involved.

When production began, Ledger would be on set every day in full costume and makeup - but he'd only be in character when filming. Make-up artist John Caglione told Movie Geeks United in 2012 that Ledger would skateboard around, goof off, smoke cigarettes, and give out bear hugs at the beginning and the end of every workday. When it was time for him to work, however, he had his Joker diary close by to bring the character out at will.

Method acting is a tricky thing, and if Suicide Squad had done well in theaters, maybe people would argue that art can excuse being a little eccentric. But as it stands...maybe not.

Suicide Squad: Extended Cut will be available digitally on November 15th and on Blu-ray December 13th.